Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2019   09:59:15   (  -0.00,-128.19) (  -0.19,-127.25)  106.12                80
 12/10/2019   22:18:15   (   0.02,-128.11) (  -0.97,-132.49)  498.99                80
 12/11/2019   22:01:59   (   0.01,-128.08) (   0.05,-127.92)   19.48                80
 12/14/2019   10:01:55   (  -0.01,-128.03) (   0.11,-128.54)   58.00                80
 12/15/2019   09:45:40   (   0.00,-127.99) (  -0.91,-123.96)  459.67                80
 12/16/2019   22:04:39   (   0.02,-127.90) (  -0.25,-129.20)  147.09                80
 12/17/2019   21:48:22   (   0.01,-127.87) (   0.71,-124.61)  370.41                80
 12/19/2019   10:07:15   (  -0.03,-127.84) (   0.41,-129.82)  225.97                80
 12/20/2019   09:50:59   (  -0.02,-127.80) (  -0.61,-125.25)  291.34                80
 12/21/2019   22:09:57   (   0.03,-127.70) (  -0.61,-130.47)  315.96                80